Bristly Roseslug Sawfly

When I started working for Extension back when growing roses meant hybrid teas, the dominant roseslug sawfly (order Hymenoptera, family Tenthredinidae) was Endelomyia aethiops. It was so common, the common name approved by the Entomological Society of America (ESA) for this species was simply Roseslug.

The native Common Roseslug Sawfly and Curled Roseslug have largely been supplanted by the non-native Bristly Roseslug Sawfly. This sawfly has multiple generations per season with the larvae continuing to produce feeding damage.